"""add stale to consignmentRevision ID: d424258bb9cRevises: 233cdabdfe51Create Date: 2013-05-28 16:49:14.181000"""# revision identifiers, used by Alembic.revision = 'd424258bb9c'down_revision = '233cdabdfe51'from alembic import opimport sqlalchemy as sadef upgrade():    op.add_column("TB_CONSIGNMENT", sa.Column("stale", sa.Boolean, default=False))    op.execute("UPDATE TB_CONSIGNMENT SET STALE=0")def downgrade():    op.drop_column("TB_CONSIGNMENT", "stale")